Saving content from three separate editable textboxes to a single editable textbox slot

Hello, sorry I wasn’t checking forum for a few days. Yes this would be in the TextBox4. But how do you include previous ones… it depends how you save them and also depends on the situation.
Please read something about communication between Blueprints, for example maybe this course: Blueprint Communication | Course
(But there is a lot about this topic on Youtube). As there are so many ways. You could use for example GameMode class for that.